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I have throttle body

Tiny
CATHY PAYTON
  • MEMBER
  • 1989 GMC C1500
  • 26,000 MILES
I have throttle body. It has recently started idling up and down. Then it will idle real high like choke is sticking, but I thought throttle body didn't have a choke. It sometimes dies when put in gear and boggs down. Any suggestions?
Sunday, February 10th, 2013 AT 1:30 AM

5 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Clean throttle body and IAC with throttle body cleaner and scan for any unresolved fault codes start here.
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Sunday, February 10th, 2013 AT 1:35 AM
Tiny
CATHY PAYTON
  • MEMBER
  • 4 POSTS
Already did that and replaced sensors, fuel filter, plugs and wires. Even took it to shop and they couldn't fix it. I'm stumped.
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Sunday, February 10th, 2013 AT 1:51 AM
Tiny
MHPAUTOS
  • MECHANIC
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May be electrical, but I would base my checkes around the IAC have you tried a know good one as a test?
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Sunday, February 10th, 2013 AT 1:58 AM
Tiny
CATHY PAYTON
  • MEMBER
  • 4 POSTS
No. Sorry but whats the iac?
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Sunday, February 10th, 2013 AT 2:03 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Idle air Control motor.
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Sunday, February 10th, 2013 AT 4:13 AM

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